Entry #3 is good. I like the split in color plays off the leverage name, however I don't feel this is the most professional and polished of the three.
Entry #1 is more polished is closer to the professional look & feel of the logo of a consulting agency, however juxtapose to #2 I feel it is a bit more cluttered on the logo.
Of the three, Entry #2 is the clear leader at this point. Good work!